CONTROL SYSTEM
01–40–39
01–40
PCM FUNCTION [LF]
E5U014018880N01
Function List
• The control descriptions are as shown below.
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PCM CONSTRUCTION/OPERATION [LF]
E5U014018880N02
Structure
• A 120-pin (two-block) PCM connector has been adopted.
End Of Sie
Function Description
Main relay control When the ignition switch is turned to the ON position, the main relay turns on.
Drive-by-wire control The drive-by-wire control calculates the optimum target throttle valve opening angle at all
ranges of engine speeds and controls the throttle valve actuator.
Drive-by-wire relay control Supplies power to the drive-by-wire control.
Variable intake air control Switches energization of the variable shutter valve actuator according to engine speed to
enhance the inertia charging effect.
Variable valve timing control Changes the intake valve timing according to engine operation conditions to improve engine
output, fuel economy and exhaust emission performance.
Fuel injection control Performs optimum fuel injection according to engine operation conditions.
Fuel pump control Performs energization of the fuel pump relay only when the engine is running (operates fuel
pump) to improve stability and durability.
ESA control Controls ignition to optimum timing according to engine operation conditions.
Evaporative purge control An appropriate amount of evaporative gas is fed into the dynamic chamber by the driving of the
purge solenoid valve according to the engine operation conditions to ensure driveability and
prevent release of fuel vapor gas into the atmosphere.
EGR control Adjusts the EGR to the optimum opening angle according to engine operation conditions.
HO2S heater control Based on the control of the front and rear HO2S heater, a stabilized oxygen concentration is
detected even at low exhaust gas temperature and feedback control of fuel injection even
during cold engine start is made possible for improved cold temperature emission performance.
A/C cut-off control The current application (energize/non-energize) to the A/C relay (magnetic clutch) is controlled
according to the engine operation conditions to prevent deterioration of engine performance,
damage to the engine, and deterioration of the A/C function.
Electrical fan control Through cooling of the radiator and condenser by operation of the cooling fan according to
vehicle conditions, engine reliability and cooling performance have been improved.
Starter cut-off control Theft deterrence has been improved by controlling energization to the starter relay according to
an engine stop request signal from the immobilizer system.
Generator control Generator output is optimized according to the engine operation and electrical load conditions,
ensuring idling stability and anti-load performance.
CAN Used for communication with the EHPAS control module, ABS HU/CM, instrument cluster and
DLC-2.
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